<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button"> {{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="hotItem in hot" :key="hotItem.id" @click="handleCityClick(hotItem.name)">
            <div class="button">{{hotItem.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(city,index) of cities" :key="index" :ref="index">
        <div class="title border-topbottom">{{index}}</div>
        <div class="item-list">
          <div class="item border-bottom" v-for="cityName of city" :key="cityName.id" @click="handleCityClick(cityName.name)">{{cityName.name}}</div>
        </div>
      </div>
      
      
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState , mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props:["cities","hot",'letter'],
  mounted(){
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  methods:{
    handleCityClick(city){
      // this.$store.commit('changeCity',city)
      this.changeCity(city)
       this.$router.push("/")
    },
    ...mapMutations(['changeCity'])
  },
  computed:{
    ...mapState({
      currentCity:"city"
    })
  },
  watch:{
    letter () {
     if(this.letter){
      const element =this.$refs[this.letter][0]
      this.scroll.scrollToElement(element)
     }
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #ccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>